Sash-balance.



PATENTED APR. 14, 1908. J. DALY-& T. S. LEAKE.

SASH BALANCE.

APPLICATION FILED AUG.12. 1905.

sectiona view on line 2-2 of Fig. 1

; UNITED STATES PATENT OFFICE.

MICHAEL L DALY AND THOMAS S. LEAKE, OF CHICAGO, ILLINOIS.

SASH-BALANCE.

Specification of Letters Patent.

Patented April 14, 1908.

Application filed August 12, 1905. Serial No. 274,010.

Cook and State of lllinols, have invented a.

certain new and useful Improvement 'in Sash-Balances, of which the following is aspecification.

Our invention relates to sash balances and has for its object to provide new and improved constructions for devices of that class. The invention will be illustrated and described with reference particularly to the use of our novel construction of pulle in sash balances and the like, and it is one o the objects of our invention to rovide new and useful arrangements in sue sash balances; but'it will be obvious, of course, that the invention is capable of other applications.

The invention is illustrated in the accompanying drawings wherein Figure l is an elevation of a window from within, arts being broken away; Fig 2, a i 3, a detail section. through the pulley of Fig. 2; Fig. 4, a section on line4-4 of Fig. 3; Fig. 5, an end or edge view of the pulley, and Fig. 6, a section similar to that of Fig. 3, showing a modification.

: lower end with screw holes for the securing screws E E The casting E is 'apertured at E for the sheave and backward from the aperture extend the side pieces E E. Between these side pieces is secured the core F in any desired manner, as for example, by the rivets F F. The sheave consistsof a relatively thin annulus G which turns u on the core F. Preferably it is formed wit 1 a groove for the cord H, as shown at G. In

the modification shown in'Fig. 6, the annular sheave G is provided with the teeth or cogs G This latter form of pulley is made use of when a chain is used instead of a cord. The pulley in either case consists of a core or axle of a diameter nearly as great as that of the annular sheave. This, of course, results in considerable friction if the parts are ropes made, when the sheave turns on t e core. Preferably the side pieces E E extend back so as to form the flanges E E which prevent the cord from slipping 0d the sheave. When a pulleythus constructed so as to develop friction between the parts bearing u on eac other is used in a window, the resu t is that the movement of the sash is braked in starting and stopping. A smooth, even action is gained thereby. The pulley as above described, as has been suggested, is adapted for usein a sash-balance. It may. be used in Windows of any form of construction, but we consider it particularly useful in connection with the arrangement of the sashes and weights which we are about to describe.

Referring particularly to Figs. 1 and 2, we have shown an arrangement'by which the two sashes of the window are counterbal-- anced by a single weight. The cord His secured at one end to the lower sash C in any preferred manner, as for instance, by means of the staple H and then extends upward over the right-hand pulley E, as shown in Fig. 2, then down around a movable pulley H of any preferred sort, then up over the pulley shown at the left-hand side of Fig. 2, its other end being secured tothe uppersa'sh by means of the sta le H Connected with the pulley H is the anger H having a hook H to which is hung. theweight J. It will be understood, of course, that this arrangement may be duplicated'on the other-side of the window.

The advantages in simplicity and economy advantageously used in other connections and in other arrangements of window sashes than that shown herein.

The modification shown in Fig. 6 will, of

course, operate in the same-manner as the form above described except that the cord Ii will be replaced by a chain.

means for supporting t 1e weight.

We claim:

1. In a sash balance, the combination of a 5 window sash with a counterbalancing element, a cord and a pulley comprising a core anda sheave, said sheave having an ex-' tended bearing surface 111 contact with the core so as to develop braking friction betwem it and the core to brake the movement of the sash.

2. In a sash balance, the combination of a window sash with a. eounterbalancing element, a cord and a pulley comprising a core and a thin annular sheave, said sheave having an extended bearing surface in contact with the core so as to develop braking friction between it and the core to brake the movement of the sash.

In a sash balance, the combination of a window sash, with a cord, two pulleys each C(H'III'HlSIIIg a core and a thin annular sheave mounted thereon as described, and a weight j hung in the turn of the cord between-the two j pulleys.

4 4. In a sash balance, the combination of two window sashes, asmglc cord attached to each of the sashes, a (iOUlliel'lntludlclllg' eiu- I ment, said sheave having an extended bearing surface in contact with the core so as to develop braking friction bet-ween it and the core to brake the movement of the sash.

l two sashes, a single cord attached at each end to one of the sashes, two fixed pulleys over whichthe cord runs, a eounterbalancing weight hung from the turn in the cord between the pulleys, said pulleys comprising each a core and a thin annular sheave mounted thereon as described.

MICHAEL J. DALY. 'lllOMAS S. llE-AKE.

Witnesses:

A. J. MoDoNALn, W. H. HUGHEY.

5. In a sash balance, the combination of 

